Matthew 7:12-14 - The Golden Rule
12 Therefore all things whatsoever you may wish that the people may do unto you, do ye even so unto them: for this is the law and the prophets.
13 Enter ye in through the narrow gate: because wide is the gate and broad is the way, that leadeth to destruction, and many there are, who are going in through it. 14 Because narrow is the gate, and contracted the way, that leadeth into life, and few there are who find it.